Ctrl+a should select all entries on chrome://history

Issue description

Chrome Version: 63
OS: ChromeOS, Linux, probably the others as well
What steps will reproduce the problem?(1) Go to chrome://history
(2) Search for something or click "More from this site" in the context menu of an entry
(3) Press ctrl+a
What is the expected result?
All entries should be selected
What happens instead?
Ctrl+a is not handled eplicitly, some text on the history page is selected.
Selecting all entries is quite complicated (select first, shift+click last)

This is problematic in an infinite list world. We don't actually have all the results, so we can't select all of them.
_However_, since the only thing you can do with history results is delete, them, we can probably get away with selecting all the visible history items, and having an 'All items selected' message or similar.
This might be nice to have, but the canonical way of clearing all your history is just to click Clear Browsing Data in the sidebar. Does this Ctrl + A functionality provide anything extra?

Bookmarks always has all its items.
It'll be confusing for the key to only work sometimes. I agree that it's useful to delete searches, but again, it's hard to do reliably with the infinite list. Maybe it's okay to just select all the rendered items. The search should refresh if we also move the list to the bottom, so it should be obvious to the user that more results have been loaded and they can mash ctrl+a again?